This is a cool original poster by Knut Yran promoting Oslo as the Viking Capital. The poster has a rendering of a Viking holding a serving dish with illustrations of the inner Oslo fjord, sail boats, Oslo City Hall, a Viking ship and the Kon-Tiki raft.

The poster has been printed several times and this is the 1965 German version. It has a small piece missing at upper left and some slight wear. Would look great framed!